You said outcall, and you also mention meeting at an upscale hotel. So is she coming to you at your upscale hotel? Just making sure you are not confusing outcall and incall. If you are going to her, it is "incall. "If she is coming to you for an outcall, it is not likely that she is LE, but it is not impossible. "Usually" when LE does stings they will set up an incall, so they can catch a lot of guys, not necessarily go after individual guys one by one at outcall situations.
Could she be LE? Sure! Could she be a great escort who just doesn't have any reviews yet? Sure! Could she be a "bait and switch" or "cash and dash" or any number of other scams? Sure! The question is do you want to TOFTT? As a newbie you should not. You should stick to well known and well reviewed providers.